CICSplex JVM Classcache Details attribute group

The CICSplex JVM Classcache Details attributes report information about the size, amount of free space, date and time when it was started, and related profile name for the given class cache.

Autostart Indicates the current status of autostart for the shared class cache. These are the values:

ENABLED

The shared class cache is started as soon as CICS receives a request to run a Java application in a JVM whose profile requires the use of the shared class cache.

DISABLED

An explicit EXEC CICS PERFORM CLASSCACHE INITIALIZE(START) command (or the equivalent CEMT command) is required to start the shared class cache. If the status of the shared class cache is STOPPED and autostart is disabled, and CICS receives a request to run a Java application in a JVM whose profile requires the use of the shared class cache, the request fails.

Cache Free Indicates the free space in the shared class cache, in kilobytes.

Cache Size Indicates the size of the cache in kilobytes.

CICS Region Name Indicates the job name or modify ID of theCICS region being monitored. Each CICS region in a z/OS operating system has a unique name. This name is an alphanumeric string, with a maximum of eight characters, and case-sensitive. CICS region names are always in uppercase characters.

Number of old caches Indicates the number of old caches that are still present in the region because they are waiting for worker JVMs that are dependent on them to be phased out. If the status of the current shared class cache is STOPPED, and worker JVMs are still dependent on it, then that shared class cache is included in the number of old shared class caches.

Origin Node Is the combination of the z/OS System ID (SMFID) and the CICS region name. The value format is an alphanumeric string, maximum 32 bytes, and case-sensitive.

When a situation is true, the system compares the origin node name in the attribute to the names of managed systems assigned to the item. If the origin node name matches the name of a managed system, the status of the item changes accordingly. If the names of the origin node and the managed systems do not match, the status of the item remains unchanged.

Phasing Out Indicates the number of JVMs that are phasing out. This is the number of working JVMs that are dependent on an old shared class cache and are being phased out. If the status of the current shared class cache is STOPPED, then any worker JVMs that are still dependent on it are included in the number of worker JVMs being phased out.

Profile Indicates the name of the JVM profile used for the main JVM. The name of the JVM profile that is to be used to start the main JVM. If the main JVM is in use, this is the name of the JVM profile for that main JVM.

Reuse Status Indicates the reuse status of the main JVM. These are the valid values: RESET, REUSE, or UNKNOWN. The RESET value indicates that the JVMs can be reused after they have been reset. The REUSE value indicates that the JVMs can be reused without being reset. The UNKNOWN value indicates that the class cache has not been started.

Start Date Indicates the date when the current class cache was started. This is an alphanumeric string, with a maximum of 10 characters.

Start Time Indicates the time when the current class cache was started. This is an alphanumeric string, with a maximum of eight characters.

Start Time and Date Indicateds the time and date when the current shared class cache was started.

Status Indicates the current status of the shared class cache. These are the values:

STARTING

The shared class cache is being initialized. If autostart is enabled, the shared class cache is starting either because CICS received a request to run a Java application in a JVM whose profile requires the use of the shared class cache, or because an explicit EXEC CICS PERFORM CLASSCACHE INITIALIZE(START) command (or the equivalent CEMT command) was issued. If autostart is disabled, the shared class cache is starting because an explicit EXEC CICS PERFORM CLASSCACHE INITIALIZE(START) command (or the equivalent CEMT command) was issued. Worker JVMs that require the use of the shared class cache must wait until the startup process is complete and the shared class cache is ready. If initialization of the shared class cache is unsuccessful, any waiting requests for worker JVMs fail.

STARTED

The shared class cache is ready, and it can be used by worker JVMs.

RELOADING

An EXEC CICS PERFORM CLASSCACHE INITIALIZE(RELOAD) command (or the equivalent CEMT command) has been issued, and a new shared class cache is being loaded to replace the existing shared class cache. Worker JVMs, both those that were already allocated to tasks and those that were allocated to tasks after the command was issued, continue to use the existing shared class cache until the new shared class cache is ready.

STOPPED

The shared class cache has either not been initialized on this CICS execution, or it has been stopped by an EXEC CICS PERFORM CLASSCACHE TERMINATE command or an EXEC CICS SET JVMPOOL TERMINATE command (or the equivalent CEMT commands). If autostart is disabled, requests to run a Java application in a JVM whose profile requires the use of the shared class cache (that is, requests for worker JVMs) fails. If autostart is enabled, a new shared class cache is initialized as soon as CICS receives a request to run a Java application in a JVM whose profile requires the use of the shared class cache.

System ID Indicates the four character name that uniquely identifies an active z/OS operating system within a given CICSplex. The value format is an alphanumeric string, maximum four characters, and case-sensitive. z/OS System IDs are always in uppercase characters.

Total JVMs Indicates the number of working JVMs in the CICS region that are dependent on the shared class cache.